As long as the spring bars on your # BLU67FR are in good shape there shouldn't be a need to replace them. If they are significantly worn, bent, or damaged then I would replace them along with the L-Bracket Plates # BLU42QR. The correct spring bars for your system are the # BLU25FR. For the L-Brackets with the mounts you need the # BLU72QR. view full answer...